3D Sound Navigation System Directional Audio Guidance
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Solution Overview
Problem
Conventional navigation systems use mono speakers for voice guidance, leading to driver confusion, especially in complex intersections and alleys, as the voice guidance lacks directivity, making it difficult for drivers to determine the correct direction without visual reference, increasing the risk of accidents.
Innovation Solution
A navigation system utilizing 3D sound technology with directivity, which calculates and generates sound angles based on the vehicle's proceeding and destination directions, providing a 3D guidance sound through a combination of a direction measuring unit, sound angle setting unit, and 3D sound generating unit, using head-related transfer functions to simulate sound localization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If mono speakers are used for voice guidance, then the navigation system is simple and cost-effective, but the driver cannot determine the correct direction intuitively, leading to confusion and increased accident risk
Solution Approach 1:
The patent transitions from conventional mono sound output to 3D spatial sound output, adding a spatial dimension to the audio guidance. By calculating sound angles based on vehicle position and destination direction, the system creates directional audio cues that help drivers intuitively understand the correct turning direction without visual reference
Solution Approach 2:
The patent applies different sound angles to different spatial locations relative to the vehicle. By calculating specific sound angles based on the angle between the vehicle's proceeding direction and the destination direction, each speaker channel produces sound with localized directional characteristics, enabling drivers to determine correct direction through spatial audio perception
2Loss of information
If voice guidance is provided without directivity, then the speaker system is simple, but the driver has difficulty finding the correct proceeding direction at intersections and alleys
Solution Approach 1:
The system pre-calculates sound angles based on the vehicle's current position, proceeding direction, and destination direction before providing guidance. By determining the angle between the vehicle's proceeding direction and the destination direction in advance, the system prepares directional audio information that will be output through the 3D sound system
Solution Approach 2:
The patent introduces sound angle calculation as an intermediary process between navigation data processing and audio output. The sound angle, calculated based on the angle between vehicle proceeding direction and destination direction, serves as a mediator that translates spatial navigation information into directional audio cues for the driver
3Reliability
If continuous direction guidance is provided, then the driver receives frequent updates, but the driver has difficulty selecting the correct reacting point and proceeding direction
Solution Approach 1:
The patent dynamically adjusts sound angles based on the vehicle's real-time position and the angle between the proceeding direction and destination direction. As the vehicle moves and the angular relationship changes, the sound angles are continuously updated to maintain accurate directional guidance, helping drivers identify the correct reacting point
Data Source
AI summary
Provided are a method of voice-guidance and a navigation system that guide a travel route of a mobile vehicle using a 3D sound having directivity. The method includes detecting at least one of a proceeding direction and a destination direction of a mobile vehicle base on navigation data, calculating a proceeding angle of the mobile vehicle and an angle of a destination direction based on at least one of the detected proceeding direction and the destination direction of the mobile vehicle, and generating a 3D direction-guidance sound of corresponding angle by providing the calculated angles to 3D sound technology.